Indian Ruins, Montezuma Well, Arizona
Montezuma Well contains several forms of plants and animals not found in any other waters in the world. In part, this may be due to the constant input of large quantities of warm water that enter the Well through underground springs which keeps the environment within the Well very stable. Also, there are no fish in the Well, due to concentrations of dissolved carbon dioxide that are nearly 600 times higher than other natural aquatic environments. These unusual conditions have allowed the aquatic organisms in the Well to look and act differently than they do in other ponds and lakes. Therefore, Montezuma Well provides an opportunity for scientists to carefully study the interactions between these unique plants and animals.